Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
  • G01B11/00—Measuring arrangements characterised by the use of optical techniques
  • G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
  • G01B11/275—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing wheel alignment
• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
  • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
  • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
  • G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
  • G01B2210/00—Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors
  • G01B2210/10—Wheel alignment
  • G01B2210/30—Reference markings, reflector, scale or other passive device

Definitions

• the present invention relates to a measuring panel for the optical measurement and/or calibration of a vehicle component, in particular a chassis of a motor vehicle.
• the invention also relates to a device and a method for optically measuring and/or calibrating a vehicle component using a measuring panel designed according to the invention.
• measuring heads are regularly used which record images of measuring panels attached to the wheels of the motor vehicle.
• relevant parameters of the chassis of the measured motor vehicle can be determined, e.g. camber, toe-in or rim runout values.
• Such measuring panels can also be used to calibrate a component of a driver assistance system, for example a sensor/camera of a driver assistance system.
• An optical feature is a feature in a mark pattern that can be optically detected and whose parameters can be determined algorithmically.
• the optical features can be, for example, significant points such as centers, corners or intersections of geometric objects, but also texture features that are dependent on the gray value or pattern.
• a reference mark pattern can, for example, contain separate, touching, intersecting, ordered or disordered elements or also one or more complex structures whose parameters that are significant for the measurement cannot easily be detected by a human being.
• parameters of the optical measuring mark patterns formed on the measuring panels which describe the arrangement of the optical features within the measuring mark pattern, must be known with high accuracy and be taken into account when evaluating the recorded images. It is therefore an object of the present invention to specify measuring boards for the optical measurement and/or calibration of a vehicle component that make it possible to make the parameters of the optical measuring mark patterns formed on the measuring boards known to the measuring heads in a simple and reliable manner.
• a measurement board according to the invention for the optical measurement and/or calibration of a vehicle component, in particular for the measurement of a chassis of a motor vehicle, comprises at least one optical feature and at least one optically detectable information carrier of measurement board information relating to the measurement board itself.
• the at least one optical feature is embodied or attached on a front side of the measuring panel, and the at least one optically detectable information carrier is embodied or attached on a rear side of the measuring panel.
• the measuring panel information which for example contains parameters of the measuring mark pattern formed on the respective measuring panel, can be made known to the measuring heads easily and reliably. In particular, transmission errors that can occur when the measuring panel information is manually transmitted to the measuring heads can be reliably avoided.
• the optically detectable information carrier is independent of the at least one optical feature, in particular of the reference mark pattern, which comprises one or more optical features and which is on a front side of the Measuring panel is formed.
• the optical features or the optical measuring mark pattern are therefore not affected by the optically detectable information carrier, and the area of the measuring panel does not have to be increased in order to accommodate the optically detectable information carrier in addition to the measuring mark pattern on the measuring panel, without the optical features or the measuring mark pattern to affect.
• the at least one optically detectable information carrier can contain any selection and/or combination of the measuring board information listed below.
• First gauge information may define a product identifier ("Type").
• Type a product identifier
• the measuring process can be automatically controlled by attaching the respectively required measuring board via the product code. For example, by changing the measuring panels in an ongoing vehicle measurement, you can automatically switch to a program for adjusting a driver assistance system. But even without an automatic sequence control, the use of the correct measuring boards for the measuring task can be checked via the product ID, thus avoiding incorrect operation.
• the product identifier also enables the wheel alignment system to use different measuring boards for one and the same measuring task. This is particularly advantageous if the measuring boards are technically changed as part of product development and an adjustment of the parameters for the measurement is necessary. As part of software updates, the wheel alignment system can be continuously expanded to include product identifiers for new measurement panels and their associated parameters.
• the optical determination of the optical characteristics can be simplified with the help of a product identifier.
• a second piece of measuring panel information can contain an individual identifier, for example a serial number.
• An individual identifier on the measuring board can enable the software to automatically assign stored parameters to the measuring board.
• the parameters of the measurement board can be downloaded from a server on which the parameters of several measurement boards are stored. If no assignment can be made, provision can be made for an error message to be generated in order to prevent an incorrect measurement. Inexpensive, measured measuring boards can therefore also be used safely in mono camera systems. Incorrect measurements caused by missing or incorrectly assigned parameters of the measuring boards can be prevented by automatically assigning the parameters to the associated measuring boards.
• the measuring boards can be automatically checked for their suitability using software such as online diagnostics or integrated service tools. In this way, the manufacturer can clearly trace back the measuring panels and, if necessary, recall them as part of a recall campaign or a service exchange.
• An individual identification of the measuring panels is also suitable for plausibility checks and/or for process control during the so-called "reversal measurement” when checking the accuracy of the system.
• a third piece of measuring panel information can contain geometric information about the measuring panel and/or an optical measuring mark pattern formed on the measuring panel. Geometric information on the measuring board itself or on details of the measuring board (reference objects), such as the distance between reference points or deviations from a specified reference measuring mark pattern, can be included as parameters or auxiliary parameters in the chassis measurement and thus increase the measurement accuracy.
• the measuring board information can in particular also contain the reference of the optical features or the measuring mark pattern to an attachment device which is designed to attach the measuring board to a motor vehicle, for example a wheel adapter.
• Fourth measurement panel information can define optical properties of the measurement panel and/or the markers. Knowing the optical properties of the measuring panel and the markers, lighting and exposure control can be accelerated in the course of a measurement process by selecting suitable start parameters and optimizing the iteration process. Additional information such as the optical properties of an optional transparent protective layer applied to the sample, eg its thickness and/or the refractive index to determine the optical refraction of the light, can be used to increase the measurement accuracy. Furthermore, the measurement process during chassis measurement, such as the steering angle and the roll-off angle, can be adapted to the optical behavior of the reflective marks (e.g. degree of reflection, reflection angle, etc.) and thus an optimized and overall faster measurement can be achieved. This is particularly advantageous when the optical properties of the optical features and/or measuring panels change as part of product development.
• the optical properties of the optical features and/or measuring panels change as part of product development.
• the gauge information is encoded in the at least one optically detectable information carrier.
• all gauge information is present in or on the gauge itself and no other sources need be present and read out in order to obtain the desired gauge information. This simplifies the handling of the measuring boards, and possible sources of error, which can result from incorrect assignment of the information coded in the optically detectable information carrier to a source, can be reliably ruled out.
• the measuring panel information can be encoded in a compressed form in the at least one optically detectable information carrier.
• the gauge information is encoded in a machine-readable form in the at least one optically detectable information carrier, so that the gauge information can be read out of the optically detectable information carrier easily, conveniently and with a low probability of error.
• the machine-readable form contains at least one element from the group comprising: alphanumeric symbols or the like, a one-dimensional code, in particular a bar code, or a two-dimensional code, in particular a QR code; or a combination thereof.
• Alphanumeric symbols can also be optically captured by a human and, if necessary, transmitted manually to the measuring heads via an input device.
• a one-dimensional code such as a bar code, is special easily machine-readable and evaluable.
• a two-dimensional code in particular in a QR code, a large amount of data can be encoded in a small area.
• At least one optical identification pattern is formed on the front of the measuring panel in addition to the at least one optical feature, which makes it possible to identify the measuring panel using an image recording device (camera) directed at the front of the measuring panel.
• the measuring panel can be clearly identified using an image recording device present in a measuring head when the measuring panel is mounted on a vehicle wheel in a measuring position, i.e. in an orientation in which the front side of the measuring panel faces the measuring head.
• the identification pattern includes a number of geometric identification elements, for example circles or polygons, in particular rectangles and/or squares. In one embodiment, the identification pattern comprises a plurality of geometric identification elements of the same type. Such identification elements can be produced particularly easily and inexpensively.
• the identification elements are formed in a measurement board-specific number on the measurement board and/or arranged in a measurement board-specific arrangement on the measurement board, so that the measurement board can be clearly identified based on the measurement board-specific number and/or the measurement board-specific arrangement of the identification elements. In this way, the measuring board can be identified by machine with great reliability.
• a gauge in one embodiment, includes one or more optically visible areas that can be used for identification. Subsequent individual elimination of the optical visibility, such as covering, physical or chemical destruction of individual areas, the remaining visible arrangement of identification elements can enable unambiguous identification of the measuring panel.
• the identification elements are arranged in a vertical, horizontal or diagonal or obliquely aligned row on the measuring panel.
• the identification elements can be above, below or next to the at least an optical feature on the measuring board.
• the identification elements can be arranged in particular on a side facing away from the motor vehicle (outside) of the at least one optical feature when the measurement panel is mounted in a position suitable for chassis measurement on the wheel of the vehicle to be measured.
• the identification features are integrated into the mark pattern. If different mark patterns are formed on different measuring panels, these permit direct identification of the measuring panel and can therefore be used as identification elements.
• the measurement board comprises a first measurement board element and a second measurement board element formed separately from the first measurement board element.
• the at least one optical feature and the at least one optically detectable information carrier are formed on the first measuring board element, and the identification pattern is formed on the second measuring board element.
• the measurement panel elements are plate-shaped, i.e. essentially 2-dimensional.
• the width and the height of the gauge elements are significantly larger than their thickness, so that the gauge elements can be considered as 2-dimensional gauge elements.
• the measuring board has a measuring board element carrier which is designed to receive the first and the second measuring board element.
• the first and the second measuring board element can be attached to the measuring board element carrier and can be detached from it, in particular independently of one another.
• different measuring mark patterns can be combined with different identification patterns in a measuring panel element carrier to form a measuring panel.
• the first measuring panel elements on which the optical features or measuring mark patterns are formed can be easily replaced if necessary.
• the optical visibility of individual identification elements or areas can be restricted temporarily, for example by covering them, or permanently, for example by physical or chemical destruction, in order to create a unique identification pattern.
• the measuring panel element carrier can be attached to a vehicle wheel with the aid of an attachment device, in particular with the aid of a wheel adapter.
• the invention also includes an attachment device, in particular a wheel adapter, with a measuring panel according to the invention, the attachment device being designed to be attached to a wheel of a motor vehicle in order to position the measuring panel in relation to the wheel of the motor vehicle.
• an attachment device in particular a wheel adapter, with a measuring panel according to the invention, the attachment device being designed to be attached to a wheel of a motor vehicle in order to position the measuring panel in relation to the wheel of the motor vehicle.
• the invention also includes a device for optically measuring and/or calibrating a vehicle component, in particular a chassis or a driver assistance system, with at least one image recording device, at least one image processing unit and at least one measuring board designed according to the invention.
• the at least one measuring board can be attached to a vehicle wheel, in particular using a wheel adapter, and the at least one image recording device is configured to record an image of the optically detectable information carrier of the at least one measuring board and to transmit the recorded image to the at least one image processing unit.
• the at least one image processing unit is designed to decode the measurement panel information by image processing from the recorded image of the optically detectable information carrier and to use the decoded measurement panel information in a subsequent measurement and/or calibration.
• the device for optically measuring and/or calibrating a vehicle component comprises at least one measuring head, in which at least one image processing unit and at least one image recording device are formed.
• each measuring head comprises two image recording devices, one image recording device provided for recording an image of a measuring panel attached to a front wheel of a motor vehicle, and one An image pickup device provided for taking an image of a gauge board attached to a rear wheel of an automobile.
• the device for optically measuring and/or calibrating a vehicle component includes, in particular, two measuring heads which are intended to be arranged on one side of the vehicle.
• the two measuring heads each include a reference system.
• the reference systems are designed to determine the position and alignment of the measuring heads relative to one another, so that the images recorded by the two measuring heads can be brought into a common coordinate system.
• the device for optically measuring and/or calibrating a vehicle component comprises a mobile image recording device which is designed separately from the measuring heads and is designed to record an image of the optically detectable information carrier.
• the optically detectable information carrier can be easily detected with a mobile image recording device, which is designed separately from the measuring heads, in order to make the measuring panel information contained in the optically detectable information carrier known to the device, in particular a measuring head of the device.
• the mobile image recording device can in particular be an image recording device (camera) of a mobile input device, for example a smartphone or a tablet PC.
• the invention also includes a method for optically measuring or calibrating a vehicle component, in particular a chassis or driver assistance system, using at least one measuring board according to the invention, the method having the steps of: attaching the at least one measuring board to a vehicle wheel or to a driver assistance system for calibrating required measuring equipment; recording an image of the at least one optically detectable information carrier; Recognizing and decoding the measuring panel information contained in the image of the at least one optically detectable information carrier; capturing at least one image of the at least one optical feature; and using the measurement panel information the measurement or calibration of the vehicle component using the at least one recorded image of the at least one optical feature.
• the method includes recording the at least one image of the at least one optical feature with a stationary image recording device of a device for optical measurement and/or calibration of a vehicle component.
• the stationary image recording device can in particular be a 2D camera of a measuring head.
• the method includes also recording the image of the at least one optically detectable information carrier with the stationary image recording device.
• the method includes turning the measuring board over and arranging the measuring board in front of the measuring head in such a way that the optically detectable information carrier formed on the back of the measuring board faces the measuring head and can be detected by a stationary image recording device, which is formed in the measuring head. In this way, the costs can be reduced since an additional image recording device for recording the optically recordable information carrier can be dispensed with.
• the method includes recording the image of the at least one optically detectable information carrier with a mobile image recording device that is located outside of the measuring heads.
• the at least one optically detectable information carrier on the back of the measuring board can be easily detected before the measuring board is mounted on one of the wheels of the motor vehicle or after the measuring board has been mounted on one of the wheels of the motor vehicle, without it being necessary to arrange the measuring panel in front of one of the measuring heads so that the back of the measuring panel faces one measuring head.
• the method includes associating the measuring board information contained in the optically detectable information carrier with an identification pattern; capture an image of the identification pattern; to identify the at least one measuring panel using the recorded image of the identification pattern; and to assign the measuring board information contained in the optically detectable information carrier to the measuring board identified with the aid of the identification pattern.
• the measuring board information contained in the optically detectable information carrier After the measuring board information contained in the optically detectable information carrier has been assigned to an identification pattern, it is sufficient to capture the identification pattern of a measuring board, which can be easily detected optically by an image recording device of a measuring head, in order to be able to access the measuring board information of the respective measuring board.
• Measuring panels whose measuring panel information has been assigned to an identification pattern in the manner described can be mounted on the wheels of the motor vehicle in any permutation, i.e. each measuring panel can be mounted on any wheel of the motor vehicle as the respective measuring panel information is based on the image recording device of a Measuring head optically detectable identification targets can be retrieved and clearly assigned to the respective measuring panel.
• FIG. 1 shows a perspective view of a motor vehicle standing on a lifting platform with measuring panels attached to the wheels of the motor vehicle and a measuring head attached laterally next to the rails.
• FIG. 2 shows an enlarged front view of a measuring panel according to the invention attached to a wheel of a motor vehicle with the aid of a wheel adapter.
• FIG 3 shows an enlarged rear view of the measuring board according to the invention attached to a wheel of a motor vehicle with the aid of a wheel adapter.
• FIG. 4 shows an enlarged front view of the measuring board according to the invention.
• Figure 1 shows a perspective view of a measuring station 1 equipped with a lifting platform 2 with a motor vehicle 6 standing on it.
• the lifting platform 2 has four columns 3a, 3b, namely two rear columns 3a and two front columns 3b, a rear cross member 5a and a front cross member 5b, which extend between the two front and two rear columns 3a, 3b, respectively.
• a left and right rail 4a, 4b are on the cross beams 5a, 5b.
• a measuring panel 8 designed according to the invention is attached to each of the four wheels 7 of the motor vehicle 6 with the aid of a wheel adapter 18 . Only two wheels 7 of motor vehicle 6, namely the two wheels 7 on the right-hand side of motor vehicle 6, and three of the four measuring panels 8 are visible in the perspective view of FIG.
• the front wheels 7 of the motor vehicle 6 are positioned on turntables 16 which allow the front wheels 7 to turn in steering.
• a measuring head 10 is attached on the right (outer) side of the right rail 4b (and also on the outer left side of the left rail 4a, but this is covered by the motor vehicle 6) .
• the measuring heads 10 are attached to the two rails 4a, 4b of the lifting platform 2 by means of suitable attachment means 14.
• the measuring heads 10 can, for example, be fastened to the rails 4a, 4b by being pushed onto a holding device 14 which is directed outwards and is attached to the respective rail 4a, 4b.
• the measuring head 10 is mounted in an approximately central position in relation to the longitudinal direction of the rails 4a, 4b and the vehicle 6, so that a front (not visible) image recording device of the measuring head 10 takes an image of the respective measuring panel 8 on the front wheel 7 and one to the rear Image recording device 12 of the measuring head 10 can record an image of the respective measuring panel 8 on the rear wheel 7 of the motor vehicle 6 .
• the image capture Measuring devices 12 of the measuring heads 10 can in particular be embodied as inexpensive 2D cameras.
• the measuring head 10 also includes an image processing unit 13 which is designed to process and evaluate the images recorded by the image recording devices 12 .
• a reference system is provided on the inner sides of the two measuring heads 10 facing the motor vehicle 6, ie on the side of each measuring head 10 oriented towards the respectively opposite measuring head 10, which includes a transverse camera and an optically perceptible element.
• the measuring heads 10 refer to one another in the transverse direction below the motor vehicle 6 via the reference systems of the two measuring heads 10 lying opposite one another in the transverse direction. The position and alignment of the measuring heads 10 relative to one another can thus be determined, and the images of the measuring panels 8 from both measuring heads 10 can be brought into a common coordinate system.
• a mobile and/or stationary operating device 40 can be provided, which makes it possible to enter parameters and commands and to transmit them to the measuring heads 10.
• the operating device 40 can also have a display device 42 which is designed to display measurement results, operating instructions, error messages and/or other information which has been transmitted from the measuring heads 10 to the operating device 40 .
• the operating device 40 can in particular have a touch-sensitive screen (“touch screen”), which can be used both as an input device and as a display device 42 .
• touch screen can be used both as an input device and as a display device 42 .
• the operating device 40 can be embodied with a display device (screen) 42 and an input device separate therefrom, for example a keyboard, a mouse and/or a trackball.
• the operating device 40 can also be equipped with an image recording device (camera) 44 .
• an image recording device 44 can be a smartphone or tablet PC, for example, and can communicate with the measuring heads 10 and/or a central computer (not shown in the figures) via a wired or wireless connection, eg a WLAN or Bluetooth connection.
• a conventional personal computer or a single-board computer, eg "Raspberry Pi" can be used as the central computer.
• the central computer can be designed to be operated as a web server in order to enable information to be displayed, in particular measurement results, to be displayed using a web browser. In this way, commercially available devices, in particular smartphones and tablet PCs, can be used as operating and display devices 40 .
• measuring stations 1 shown in FIG. 2 are equipped with a lifting platform 2
• measuring panels 8 designed according to the invention can also be used at measuring stations 1 that are not equipped with a lifting platform 2 .
• the measuring heads 10 can also be attached to rails 4a, 4b, which are installed on the floor of a measuring station 1, or placed next to the motor vehicle 6 on the floor of the measuring station 1.
• FIGS. 2 and 3 show enlarged front (FIG. 2) and rear (FIG. 3) views of a measuring panel 8 attached to a wheel 7 of the motor vehicle 6 with the aid of a wheel adapter 18 .
• FIGS. 4 and 5 show enlarged views of a measuring panel 8 according to the invention from the front (FIG. 4) and from the rear (FIG. 5).
• the measuring panel 8 has a frame-shaped measuring panel element carrier 20 which can be connected to the wheel adapter 18, e.g. with the aid of a plug connection, in order to support the measuring panel 8 on a wheel 7 of the motor vehicle 6.
• the measuring board element carrier 20 carries a first measuring board element 22 and a second measuring board element 24.
• the first measuring board element 22 has a larger area than the second measuring board element 24.
• the first measuring panel element 22 has, for example, a width Bi and height Hi of 10 cm to 30 cm each, in particular a width Bi and height Hi between 15 cm and 25 cm; and the second measuring panel element has a height (length) H 2 of between 10 cm and 30 cm and a width B 2 of between 5 cm and 10 cm.
• the thickness of the measuring board elements 22, 24 is usually less than 1 cm, in particular less than 0.6 cm.
• the first measuring panel element 22 shown in the figures is octagonal in shape with slightly rounded corners.
• the first measuring board element 22 is not formed as an equilateral octagon in the shape of a stop sign. Rather, the vertical sides of the first measuring board element 22 are longer than its horizontal sides. However, the first measuring board element 22 can also have other geometries that are not shown in the figures.
• the second measuring panel element 24 is essentially rectangular with two beveled corners 26 and a central indentation 28 in the longitudinal direction.
• the measuring board element carrier 20 is designed in such a way that the second measuring board element 24 can only be arranged in the shown orientation in the measuring board element carrier 20 due to the beveled corners 26 and the indentation 28 .
• a projection can be formed on the measuring board element carrier 20, which is arranged in the central indentation 28 when the second measuring board element 24 is arranged in the measuring board element carrier 20 in the orientation shown in FIGS.
• the two target elements 22, 24 can be installed in and removed from the target element carrier 20 independently of one another. As a result, various first and second measuring panel elements 22 , 24 can be combined as desired in a measuring panel element carrier 20 to form a measuring panel 8 .
• the measuring board elements 22, 24 can, for example, be pushed into the measuring board element carrier 20 and/or locked in the measuring board element carrier 20 with the aid of snap-in connections.
• a 2-dimensional measuring mark pattern 31 is formed on the front side of the first measuring panel element 22 visible in FIGS. 32, includes.
• the optical features 30, 32 can be embodied, for example, as bright measuring marks 30, 32, in particular as light-reflecting retro-reflective marks, on a black background.
• the optical features 30, 32 are circular or disc-shaped. However, other optical features not shown in the figures are also possible.
• the only condition for an optical feature or a measuring mark pattern is that its parameters, such as a position, can be determined algorithmically after optical detection.
• the measuring mark pattern 31 In order to be able to carry out the chassis measurement with the required accuracy, certain parameters of the optical features 30, 32, such as their positions, must be known with a high level of accuracy. Since the measuring mark pattern 31 can only be produced with certain tolerances, the required accuracy in the production of the measuring mark pattern 31 cannot be guaranteed. The measurement mark patterns 31 are therefore measured with high accuracy after the production of the first measurement panel elements 22, so that the parameters of the measurement mark patterns 31 can be made available with the required accuracy.
• the parameters of the measuring mark pattern 31 determined in this way are coded in an optically detectable information carrier 34 , in particular in a barcode or QR code 34 .
• the optically detectable information carrier 34 produced in this way is attached or formed on the back of the respective first measuring panel element 22, as can be seen in FIGS.
• the optically detectable information carrier 34 can be applied, for example, as a sticker to the back of the respective first measuring board element 22 or printed directly onto the back of the respective first measuring board element 22 .
• the parameters of the measuring mark pattern 31 can be determined in particular in the form of the deviations (differences) of the measured parameters from specified reference parameters and can thus be encoded in the optically detectable information carrier 34 in a space-saving manner.
• the parameters of the measuring mark pattern 31 of the first measuring panel element 22 can be made known to the measuring heads 10 by reading in the optically detectable information carrier 34 .
• the measuring panels 8 or first measuring panel elements 22 are positioned in front of a measuring head 10 before the actual measurement begins in such a way that the optically detectable information carrier 34 formed on the back of the respective first measuring panel element 22 can be optically detected by an image recording device 12 of the measuring head 10 is. The optically detectable information carrier 34 can then be read by the measuring head 10 and evaluated.
• the optically detectable information carrier 34 can be detected and evaluated with an external/mobile image recording device 44, in particular with the camera 44 of a mobile operating device 40 (see FIG. 1).
• the optically detectable information carrier 34 Since the optically detectable information carrier 34 is formed according to the invention on the back of the respective first measuring board element 22, the optically detectable information carrier 34 does not overlap with the measuring mark pattern 31 formed on the front of the respective first measuring board element 22 and does not take up any additional space on the front of the respective first measuring board element 22 to claim.
• the optically detectable information carrier 34 and the measuring mark pattern 31 can therefore be formed independently of one another on the measuring board element 22, and the optically detectable information carrier 34 can be formed in a size that is advantageous for encoding the parameters and good visibility of the optically readable code 34, without having to Dimensions of first measuring board element 22 must be enlarged or space for the measuring mark pattern 31 formed on the front side of the respective first measuring board element 22 is lost.
• the parameters of the reference mark pattern 31 stored in the optically detectable information carrier 34 can be identification pattern 52 formed in a second measuring board element 24 .
• This assignment can take place in that the identification pattern 52 of the second measuring board element 24 assigned to the first measuring board element 22 is also captured by an image recording device 12 , 44 .
• This image recording device 12, 44 can be the same image recording device 12, 44 that previously recorded the optically detectable information carrier 34. However, two different image recording devices 12, 44 can also be used for optically detecting the identification pattern 52 and for detecting the optically detectable information carrier 34.
• the parameters encoded in the optically detectable information carrier 34 can be assigned to the identification pattern 52 of a second measuring panel element 24 by manually entering a code 50 that uniquely identifies the second measuring panel element 24, in particular a number or a letter, which is formed on the second measuring panel element 24 the operating device 40 is entered.
• identification pattern 52 formed on second measuring panel element 24 is then optically captured by an image recording device 12 of measuring head 10, so that measuring head 10 uses captured identification pattern 52 to refer to the parameters stored for captured identification pattern 52 of the captured Identification pattern 52 associated first measuring board element 22 can access.
• the measuring boards 8 can be attached in any permutation to the wheels 7 of the motor vehicle 6 to be attached.
• the measuring heads 10 can recognize which measuring panel 8 is mounted on which wheel 7 of the motor vehicle 6, and can thus call up the parameters stored for the measuring mark pattern 31 of the respective measuring panel 8 and in the following chassis measurement use.
• More than four different measuring boards 8 with different identification patterns 52 can also be provided for one or more measuring positions 1 , with the measuring mark pattern 31 of each measuring board 8 being assigned a different identification pattern 52 .
• more than four different measuring panel elements 22 can be used at one or more measuring stations 1, for example adjacent ones, without the first measuring panel elements 22 being assigned incorrectly and thus causing incorrect measurement results.
• the identification pattern 52 comprises a number of identification pattern marks 54 arranged equidistantly, i.e. at equal distances from one another, along a row.
• the identification pattern marks 54 can be designed as light-reflecting retro-reflective marks.
• the identification pattern marks 54 are designed as squares and are arranged in a vertical row on an outside of the measuring panel 8 facing away from the vehicle 6 .
• the identification pattern marks 54 can also have other geometric shapes, for example rectangles, squares or ellipses. It is advantageous if the identification pattern marks 54 have a different geometric shape and/or size than the optical features 30, 32 formed on the first measurement panel elements 22, so that they can be clearly distinguished from them.
• the identification pattern markers 54 can also be arranged in a geometric arrangement other than in a vertical row, for example in a horizontal row above or below the first measurement board element 22, or in any other arrangement.
• the second measuring panel elements 24 are uniquely encoded in that at least one of the identification pattern marks 54 is missing in the equidistant row of identification pattern marks 54 . In this way, the second measuring board elements 24 can be clearly and reliably encoded, recognized and identified. However, other arrangements/codings of the identification pattern marks 54 are also possible, which enable the second measurement panel elements 24 to be clearly identified and differentiated.
• the proposed design of the measuring boards 8 with two first and second measuring board elements 22, 24 which can be combined with one another as desired enables flexible handling of the measuring board elements 22 in workshop use.
• the first measurement panel elements 22 do not yet have to be assigned to one of the wheels 7 (front/rear, right/left) of a motor vehicle 6 to be measured during their manufacture and measurement.
• First measuring board elements 22 according to the invention are precisely measured after their production, and the parameters of the measuring mark pattern 31 formed on the respective first measuring board element 22 are stored in an optically readable code formed on the back of the first measuring board element 22 .
• first measuring panel elements 22 are assigned to one of the second measuring panel elements 24 to only take place at the place of use/measuring station 1.
• the pairs of first and second measuring panel elements 22, 24 associated with one another arranged together in a measuring panel element carrier 20 and thus form a measuring panel 8 that can be used for vehicle measurement.
• measuring board elements 22, 24 Due to the flexible assignment of the first and second measuring board elements 22, 24, which does not take place during production but only at measuring station 1, measuring board elements 22, 24 can be easily replaced, e.g. if they are damaged or due to changed requirements for measuring board elements 22, 24 are to be replaced with other measuring mark patterns 31.

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• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Theoretical Computer Science (AREA)
• Length Measuring Devices By Optical Means (AREA)

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• 2020
  • 2020-08-28 DE DE102020122565.2A patent/DE102020122565B3/de active Active
• 2021
  • 2021-08-26 EP EP21769938.8A patent/EP4204762A1/de active Pending
  • 2021-08-26 US US18/023,191 patent/US20230296375A1/en active Pending
  • 2021-08-26 CN CN202180053081.XA patent/CN116420056A/zh active Pending
  • 2021-08-26 WO PCT/EP2021/073606 patent/WO2022043436A1/de unknown

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